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12012020101 = 23741505961
BaseRepresentation
bin10110010111111100…
…01110000110000101
31011000010201211211101
423023332032012011
5144100034120401
65303535140101
7603445325524
oct131376160605
934003654741
1012012020101
115104521544
1223b2974631
1311957b2a03
1481d46a4bb
154a4847101
hex2cbf8e185

12012020101 has 4 divisors (see below), whose sum is σ = 12012549804. Its totient is φ = 12011490400.

The previous prime is 12012020063. The next prime is 12012020107. The reversal of 12012020101 is 10102021021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10102021021 = 56237179633.

It can be written as a sum of positive squares in 2 ways, for example, as 9929923201 + 2082096900 = 99649^2 + 45630^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012020101 - 27 = 12012019973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012020107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229240 + ... + 276721.

It is an arithmetic number, because the mean of its divisors is an integer number (3003137451).

Almost surely, 212012020101 is an apocalyptic number.

It is an amenable number.

12012020101 is a deficient number, since it is larger than the sum of its proper divisors (529703).

12012020101 is an equidigital number, since it uses as much as digits as its factorization.

12012020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529702.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12012020101 its reverse (10102021021), we get a palindrome (22114041122).

The spelling of 12012020101 in words is "twelve billion, twelve million, twenty thousand, one hundred one".

Divisors: 1 23741 505961 12012020101